Spray control for printing presses



Aug. 13, 1929. H. c. COLE SPRAY CONTROL FOR PRINTING FRESSES Filed July7, 1928 2 Sheets-Sheet 1 1|! vs R \Q Q ww MM R ill :4 l

e //H 5% Q Aug. 13, 1929. C COLE 4 1,724,748

SPRAY CONTROL FOR PRINTING PRESSES Filed y 1928 2 Sheets-Sheet 2INVENTOR.

BY @a'uz. W

' 1 ATTORNEYSI Patented Aug. 13, 1929.

HARRY G. COLE, OF PHILADELPHIA, PENNSYLVANIA.

SPRAY CONTROL FOR PRINTING PRESSES.

In. certain lines of rinting and colored lithographing work it as beenthe practice to spray the sheet after the lithographmg, coloring orprinting has been eifected before pilin or folding with a very thin filmof para ne electrically heated to alllquld, sa1d film of paraflinehaving heretofore been sprayed over the entire area of the-printed sheetclear to the edges thereof. Whlle the liquid parafiine deposited on theprinted sheet or Web is usually considered as a film, it is in realitydeposited as innumerable, minute wax particles which are chilled be-.fore comingin contact with the paper, their 1 action being mechanicaland serving to hold the sheets apart while the inkis drying.

The object of my present invention is to provide a novel attachment,whereby the paraffine is deposited solely upon the llthographed, coloredor printed area, which I elfect by means of one or more endless apronspositioned in proximity to the printed sheet or web, said aprons havingcut-out portions which register exactl with the printed, lithographed orcolors areas, while the solid portions at the edges and intermediateportionsof said aprons preventthe paraffine from being deposited 'uponor being applied at points where it.is not desired or necesao sary.

To the above ends,,my invention consists of one or more endless apronshaving cutout portions arranged in proximity to or above and below. theprinted sheet or web,

there being upwardly and downwardly s raying nozzles arranged within theaprons a ove and below .the printed sheet or web in conjunction withbrushes or .scraping deyices which are positioned so as to contact withthe contiguous surfaces of the a ronsv while scraping the surplusparafiine t erefrom so that it can be saved and used over again.

By m novel construction, means are provided w ereb the spray or spraysof paraffine are con ed solely to the printed or lithographed area of aprinted sheet where it is needed, and said spray isfurther ke t awayfrom the edges ormargins of t e sprayed sheet and the intermediate blankportions thereof.

My invention consists of a novel method of spraying and other novelfeatures of construction and advantage all hereinaftende- Application'flled July 7, 1928. 8ers} No 290,934.

scribed and claimed in the claims appended hereto.

Referring to the drawings: Figure 1 represents a perspective view of anovel spray control for printing presses and the like, embodying myinvention.

Figure 2 represents a section on line 2-2, Figure 1.

Figure 3 represents on an enlarged scale a vertical sectional view ofthe upper nozzle seen in Figures 1 and 2.

Figure 4 represents, on an enlarged scale, a vertical sectional view ofthe lower nozzle seen in Figures 1 and 2.

Figure 5 represents, on an enlarged scale,

- a section on line 5+5 of Figure 1, showing an upper brush for removingthe parafiine from the underside of the upper endless apron.

In the drawings, in which like reference characters indicate like parts,1 designates my novel construction of spray control,

which is adapted to be readily installefd upon printing presses of anyconventional ty e. In carryln out my invention, I prow e th'egstandar sor posts 2 in the upper portions of which are provided bearings for thejournals 3 of the upper rollers 5 and 6, around which passes the endlessbelt or.

apron 7 having thecut-out portions 8 there- 1n.- The rollers 5 and 6 canbe revolved or actuated by any'suitable means, and in the presentinstance I have shown the sprocket wheel 9 around which passes thesprocket I chain 10 which can be driven from any suitable source ofpower. In the lower portions of the standards 2 are provided thebearings or journals 11 for the rollers 12 and 13 over which passestheendless apron 14 provided with t e cut-out portions 15. The rollers 12and 13 can ,be revolved by any suitable mechanism as the sprocket wheel15 driven by the sprocket chain 16, which is actuated by any suitablesource of. power. 17 designates the printed sheet or web which ispositioned between the upper and lower aprons and 14. The posts 18 serveto support the u per .and lower spray nozzles 19 and 20, w oseconstruction will be understood from Figures 3 and 4,.respectively.

Any suitable form of nozzles may be employed, and in the presentinstance I have ioo shownone' satisfactory form of nozzle whichcomprises a bar 0i aluminum or the like,

' 21, which extends across the top of the press carrying the spraynozzles, parafline supply well and their adjuncts. This bar 21 has awell 24? for the parafiine, an air supply pipe 24, a parafline deliverywheel 22 and a nozzle 23 for each inch of paper width, said bar beingset a few inches above the traveling pa er.

I The para ne being electrically heated to a liquid in any suitablemanner is introduced in to the well 24 and air is introduced through thepipe 24 into the passage 25 which is controlled by the valve 26 and theliquid parafline emerges at the point 27 under pressure in the form of afine spray, which is deflected downwardly as will be understood fromFigure 3 and the upper portions of Figures 1 and 2.

The lower spray nozzle 20 is similarly constructed, bein provided withthe well 524* ion the liquid parafiine while compressed air flows intothe passage controlled by the valve 26 and is forced outwardly so as tohave its exit at the point 28 so that a spray is discharged upwardly, aswill be understood from Figures 1, 2 and 4.

As the details of the upper and lower nozzles form, per so, no partof'my invention,

I deem it unnecessary to describe the same in further detail, as anysuitable form of spraying nozzle may be employed.

It will be understood from Figure 1 that the portions orareas, as '29,designate the printed, colored or lithographed areas on the rintedsheet'or web 17 and the cut-out port1ons'8 of the endless apron 7accurately register or align therewith, the purpose of the lower apronbeing the same so that said upper and lower endless bands or apronsction somewhat as a stencil or template,

in that the uncut portion of said aprons including the marginal portions30, the transversely uncut portions 31 and the longitudinal centraluncut portions asv32, prevent the parafline spray from being depositeduponthe printed or lithographed web 17, at places where it is notdesired. The arafline which is deposited on the inner sur aces of theupper and lower aprons is removed therefrom y means of the brushes 33,one of the upper brushes being shown in Figure 5 as being 7 supportedupon the spring 34 through which the stem 35 passes, said stem beingmount ed in the partition 36. l

The lower end of the spring 34 bears on the partition 36 and the upperend on the head 37 of the brush, so that the brush is at all times incontact with the under surfaces 38 of the upper apron, any surplusparafiine being removed and deposited in the receptacle 39.

The construction seen in Figure 5 is applicable to the upper apron andthe construction for cleaning the inner surface of zles 19 and 20, saidspray will be deposited only upon the exposed lithographed, colored orprinted areas desired, since the function of the solid portions of saidendless aprons is to prevent'the parafiine from being indiscriminatelysprayed upon all portions of the printed, colored or lithographed sheet,where it is not necessary but solely upon the exposed portion. When theprinted web 17 and the upper and lower endless aprons are traveling inthe direction of the arrows seen in Figure 1, it will be apparent thatthe parafline is simultaneously sprayed as previously described upon thedesired exposed areas and as the endless aprons continue their travel inthe direction of the arrows, their inner surface comes in contact withthe brushes 33, which remove all the surplus parafiine from said aprons,and deposit it in the receptacles 39.

It will be seen from the foregoing, that as the paraifine spray is usedsolely upon the surplus thereof is automatically removed from theendless aprons, there is no waste of parafiine under any conditions andit will be obvious that the above described novel method and apparatusis most efficient and practical and the apparatus employed is verysimple in construction and comparatively inexpensive to manufacture. I

It is evident that the rollers and the aprons can be actuated by anysuitable means other than that shown, it only being necessary that thecut-out portions of the aprons, which are usually rectangular, registeror align accurately with the colored, lithographed or printed areaswhich it is desired the parafiine spray should reach. While I have showna plurality of apertured aprons, it will be apparent that a singleapertured apron may be employed, wherever necessary or'expedient.

In printing fourcolor work on a two color press, the parafline isapplied after the first two colors are printed, and again after thesecond two colors. No difliculty is experienced in printing the secondtwo colors on top of the first application of parafline, or in backingthe sheet in a like manner.

When parafiine is applied to the web of a perfecting press, printing oneor more colors on both sides with flat-sheet delivery, it is necessaryto spray one side only to efiectively prevent all offset in the pile;but on a perfecting press equipped with folder, where in folding, twopages are brought together from either of the two sides of the web, itis necessary to spray both sides to prevent all offset, and smearing injo ging the signature prior to piling on trucl rs.

In practice the amount of parafiine being so small, it entirelydisappears on subsequent handling of the paper.

It will be understood from the foregoing that with my novel device,there 'is no waste of parafiine and that I am enabled to reclaim all theparafiine in the solid portions of the endless aprons.

It will be apparent that the sprocket chains 10 and 16 seen at the leftof Figure 1 may be driven from any suitable source of power. Inpractice, I prefer to drive said sprocket chains directly from the pressor by means of mechanism which co-acts with the devices which feed theprinted web so that I ensure at all times the registering of the apronopenings with'the printed parts, as 29, of the web 17. 1

I deem it unnecessary to show or describe the feeding mechanism for theweb 17 as my inventionis applicable to any conventional type of press.

In order that the upper apron may be positively driven under allconditions; I provide the upper rolls or drums 5 and 6 with spurs, asindicated at 40; said spurs engaging the holes 41 in the margin of theupper apron. In like manner, I provide the lower rolls 12 and 13 withthe driving spurs 42 which engage the holes 43 near the marginal edgesof the lower apron 14. 4

It will be apparent that by this construction, there is no liability ofthe upper and lower aprons slipping under any conditions as the samewill be positively driven so that the cut-out portions of the respectiveaprons will properly re 'ster or ali at all times with the printed ireas 29.

It will further be a parent that while I have shown the printe web 17 astraveling horizontally the same may stand vertical or travel in avertical direction or in an inclined direction, as may be desired.

' I am aware that the invention may be embodied in other specific formswithout departin from the spirit or essential attributes t ereof, and Itherefore desire the present embodiment to be considered in all respectsas illustrative and not restrictive, reference being had to the appendedclaims rather than to the foregoing description to indicate the scope ofthe invention.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent, is

1. A machine for spraying a printed paper web, comprising two pairs ofdriven rollers, an endless apron passed around each pair so that theirinner plies run in close proximity to-eachother, the web beinginterposedbetween said plies, each apron having openings corresponding to theportions of the web to be sprayed, spraying nozzles mounted between thelies of each apron so as to spray both sides 0? 2. A machine forspraying parafiine onto a printed, colored or lithographed paper web,comprising two superposed endless the web, and means to remove thesubstance sprayed onto the aprons- .around the openings therein.

aprons having cut out portions, means to r drive said aprons with theweb between the adjacent plies thereof, nozzles between the plies ofeach apron arranged to spray paraffine onto both sides of the webthrough the cut out portions of the aprons, and yielding brushes mountedbetween the plies of each apron to remove excess parafiine from theuncut out portions thereo HARRY C. COLE.

